Improvement in fiwace-grate baes



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@uiten tate ateat @ffice JESSE WILLIAMS, JOHN FORGIE, AND JAMES EDWARDS, 0F NEW YORK, N. Y.

Letters .Patent *No.(76,023, dated March 24, 1868.

IMPROVEMENT 1N retrace-entre BARS.

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TO ALL WHOM I'l MAY CONOERN:

- Be it known that we, JESSE WILLIAMS, JOHN Foncia, and JAMES EDWARDS, of New York, 133'Centre Street, in the county and State of New York, have invented a. new and useful Improvement in Furnace-Grate Bars; andwe do hereby declare that the following iS a full, clear, and exact description thereof, which will ,enable those skilled in the artto make and use the same, reference being had to the accompanying drawing, forming -partof this specification, in which drawing- Figure 1 represents a longitpdinal vertical section of 'this invention.-

Figure 24 is a transverse section thereof.

Figure 3 is a plan or top view of the same.

` Similar letters indicate corresponding parts.

This invention consists in a skeleton bar, composed of two webs, which are connected by three or moro transverse partitions, and by a perforated concave top, in sucha manner that the air has free access to all parts of the bar, and through the perforations of its top to the fuel resting thereon, and that by the current of air passing through it said Vbar is preserved from being burned, and a perfect and economical combustion ofthe fuel is effected. l I k A represents our grate-bar, which is composed of two webs, a a, that are connected by three or'more trans verse-partitions, Zz, ltwo at their ends and one or more between, and also by a perforated concave top bar, c, as clearly shown in the drawing, I i l The webs themselves 4are thin, wide plates, with two at bearing-Surfaces at' their ends, and an arched bottom edge, as clearly shown in g. lof the drawing, and they are cast solid with the transverse partitions and 'with the perforatedtop bar. The transverse partitions are as thin as safety and strengthl will permit, and the intermediate partitions may he tapering from thetop down, as shown in iig. 1. The top bar, whichl connects Vthe webs, is one and a half inch (more or less) thick, and the perforations are tapered off towards their bottom edges, so that ashes and cinders will readily pass through them, and'that said perforations are not liable to choke up. The top edge of our grate-bar is concave, so that when a piece of coal lies on it, the air passing up through the perforations has free access to the same, and a perfect combustion is eiected. On the outsides of the webs are the ordinary lling-strips, 0l, which serve to keep the several grate-bars at the requisite distanccs apart.

By these means a grate-bar is obtained which is not liable to burn out, Since the air passing up between the webs, aswell as between the vseveral bars, serves to lower the temperature of the bars, and, furthermore, the air has free access to the fuel, and the ashes drop through the bars without diiculty, so that theformation of clinkers is avoided.

Our grate-bar is light, easily cast, and more durable and economical, both in regard to repairsand ip regard to the perfect consumption of the fuel, than any grate-bar known to us. The top bar cpresents a continuous Surface, upon which the hoe used in clearing the re may be freely moved.

What we claim as new, and desire to secure by Letters Patent, iS-- The combination, in a furnace-grate bar, of two thin arched webs, a a, transverse partitions I), and concave 4perforated top bar c, all constructed in the manner and for the purpose herein described and represented.

JESSE WILLIAMS, JOHN FORGIE, Witnesses: l JAMES EDWARDS.

GUSTAV BERG, W. HAUFE. 

